Isotope shifts and hyperfine structure in the transitions of gadolinium |
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Authors: | K Blaum BA Bushaw S Diel Ch Geppert A Kuschnick P Müller W Nörtershäuser A Schmitt K Wendt |
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Institution: | Institut für Physik, Johannes Gutenberg-Universit?t Mainz, 55099 Mainz, Germany, DE Pacific Northwest National Laboratory, Richland, WA 99352, USA, US
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Abstract: | High-resolution resonance ionization mass spectrometry has been used to measure isotope shifts and hyperfine structure in
all (J
= 2-6) and the transitions of gadolinium (Gd I). Gadolinium atoms in an atomic beam were excited with a tunable single-frequency laser in
the wavelength range of 422-429 nm. Resonant excitation was followed by photoionization with the 363.8 nm line of an argon
ion laser and resulting ions were mass separated and detected with a quadrupole mass spectrometer. Isotope shifts for all
stable gadolinium isotopes in these transitions have been measured for the first time. Additionally, the hyperfine structure
constants of the upper states have been derived for the isotopes
155, 157
Gd and are compared with previous work. Using prior experimental values for the mean nuclear charge radii, derived from the
combination of muonic atoms and electron scattering data, field shift and specific mass shift coefficients for the investigated
transitions have been determined and nuclear charge parameters for the minor isotopes
152, 154
Gd have been calculated.
Received 18 November 1999 |
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Keywords: | PACS 32 10 Fn Fine and hyperfine structure |
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